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Titolo:
A NEW SPECTROFLUOROMETRIC MICRODETERMINATION OF NITRITE IN WATER AFTER DERIVATIZATION WITH 4-METHYL-7-AMINOCOUMARIN
Autore:
DIALLO S; BASTARD P; PROGNON P; DAUPHIN C; HAMON M;
Indirizzi:
UNIV PARIS 11,FAC PHARM,LAB CHIM ANALYT 2,5 RUE JB CLEMENT F-92290 CHATENAY MALABRY FRANCE UNIV PARIS 11,FAC PHARM,LAB CHIM ANALYT 2 F-92290 CHATENAY MALABRY FRANCE
Titolo Testata:
Talanta
fascicolo: 3, volume: 43, anno: 1996,
pagine: 359 - 364
SICI:
0039-9140(1996)43:3<359:ANSMON>2.0.ZU;2-#
Fonte:
ISI
Lingua:
ENG
Soggetto:
CHROMATOGRAPHY;
Keywords:
SPECTROFLUOROMETRIC MICRODETERMINATION; NITRITES; 4-METHYL-7-AMINOCOUMARIN;
Tipo documento:
Article
Natura:
Periodico
Citazioni:
13
Recensione:
Indirizzi per estratti:
Citazione:
S. Diallo et al., "A NEW SPECTROFLUOROMETRIC MICRODETERMINATION OF NITRITE IN WATER AFTER DERIVATIZATION WITH 4-METHYL-7-AMINOCOUMARIN", Talanta, 43(3), 1996, pp. 359-364

Abstract

A method for analysing traces of nitrites is described. The method isbased on the diazotization of a heteroaromatic primary amine-4-methyl-7-aminocoumarin (Coumarin 120(R))-by nitrite ions in acidic medium. Alarge excess of Coumarin 120(R) is mandatory for a quantitative reaction. The corresponding in-situ-produced diazonium salt is stable at room temperature and can be selectively isolated in the aqueous layer byextraction of the excess of unreacted Coumarin 120(R) with ethyl acetate. The hydrolysis of the diazonium salt at 100 degrees C yields a fluorescent product, 4-methyl-7-hydroxycoumarin (4-methylumbelliferone),which is measured by direct spectrofluorimetry (lambda(em) = 325 nm; lambda(em) = 380 nm). In this way levels of nitrites in water samples as low as 10 mu g l(-1) can be easily quantified.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 06/04/20 alle ore 21:49:43